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  3. About 3 billion people live within 100 miles (160km) of the sea, a number that could double in the next decade as humans flock t

About 3 billion people live within 100 miles (160km) of the sea, a number that could double in the next decade as humans flock t

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问题     About 3 billion people live within 100 miles (160km) of the sea, a number that could double in the next decade as humans flock to coastal cities. The oceans produce $3 trillion of goods and services each year and untold【C1】________for the Earth’s ecology. Life could not exist【C2】________these vast water reserves—and, if anything, they are becoming even more important to humans than before.
    Mining is about to begin under the seabed in the high seas. New summer shipping lanes are opening【C3】________ the Arctic Ocean. The genetic resources of marine life promise a big【C4】________: the number of patents has been rising at 12％ a year.
    But these developments are【C5】________compared with vaster forces reshaping the Earth, both on land and at sea. It has long been clear that people are damaging the oceans—【C6】________the melting of the Arctic ice in summer and the death of marine lives. Now, the【C7】________ of that damage are starting to be felt onshore.
    Thailand provides a【C8】________example. In the 1990s it cleared coastal plants to set up fish farms. Ocean storm surges in 2011, no longer【C9】________by the plants, rushed in to【C10】________the country’s industrial heartland, causing billions of dollars of damage.
    More【C11】________is the global mismanagement of fish stocks. About 3 billion people get a fifth of their protein from fish, making it a more important protein source than beef.【C12】________a vicious cycle has developed as fish stocks decline and fishermen【C13】________to grab what they can of the remainder.【C14】________the Food and Agriculture Organization, a third of fish stocks in the oceans are over-exploited. People could be eating much better, were fishing stocks【C15】________ managed.
    The forests are often called the lungs of the Earth, but the description better fits the oceans. They produce half the world’s【C16】________of oxygen. At the moment, the oceans are moderating the【C17】________of global warming— though that may not【C18】________. This cannot be good news,【C19】________scientists are still debating the likely consequences.【C20】________, the decades of damage imposed on the oceans are now damaging the environment on land.
【C4】
选项 A、surprise
B、knowledge
C、disaster
D、fortune
答案D
解析 冒号后谈到，相关的专利(patents)数量以每年12％的速度在增长，对于学术或市场方面来说，这属于一笔很大的财富。因此选D项fortune“财富”。专利数量增长，算不上是巨大惊喜，也不是巨大灾难，上下文也没有相关语义，排除A项surprise和C项disaster。B项knowledge“知识”是不可数名词，不用a。
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